Maura Reyes survived an almost unbearable trauma-the loss of her family in a home invasion. Two years later, she's still consumed by grief and acute insomnia, hiding inside her elegant, empty Los Angeles home. No amount of therapy or medication can restore what Maura lost. When her therapist suggests a change of scenery, Maura reluctantly agrees to go on a cruise. But once aboard the luxury liner, she finds herself in a bizarre and terrifying wonderland...